Fisher, Louis
McGraw-Hill, 1988
Buku Teks
Fairman, Charles
Henry Holt and Company, 1948
Buku Teks
Dowling, Noel T.
Foundation Press, 1954
Buku Teks
Mason, Alpheus Thomas,1899-1989
Prentice-Hall, 1993
Buku Teks
Schawartz, Bernard
At The University Press, 1955
Buku Teks SO